Whynotme- there are two very importanrt points you made yourself in regard to cc. Where are their Gedolei Torah and poskim ? It is sheer arrogance for them to say they have the only derech in teaching a bochur how to learn. If you go the Mir and learn the derech of Rav Nachum you will become a major Talmud Chacham. You can find on any givin bench in hudreds of places in Eretz yisroel people with a knowledge of shas and poskim far greater than you will find in any branch of cc with the exclusion of some of their Roshei Yeshiva.
The second point you made is that this is not the forum to find the right people to give you an opposing veiw. this question was shown to me by a neighbor or I would not know of it. The real Bnei torah from the other yeshivos that you want to talk do not even know how to get to this web page.
The question is if you can find a yeshiva where you will have a Rebbi to guide you. I would not suggest the Mir at your age but it is silly to think that only cc has a rebbi talmud relationship. I direct you to sichas musar by Rav Chaim Shmuelevitz of the Mir who discusses it and lived himself. It is equally silly to to say that only cc boys have midos or learn musar. Any serious Ben Torah works on himself as well as the Gemora. the mesilas yesharim and all the great sifrei musar as well as Reb yisroel salanter did not go to cc.
If you have family that are bnei torah ask them for help. you were in eretz yisroel in the summer. Where did you stay ? What did you see ? etc. Talk to real people living it and if you have visit and spend some time.
The last point I can tell you from personal observation. I spent many years close to a branch of cc and I have felt that there is a lack of emphasis on hasmada and gadlus in torah do to emphasis on other aspects of musar.
I wish you much hatzlacha.